I got called into work for a problem yesterday, so I didn't get a chance to try attaching it to the trailer yet.

I did open the package and un-roll everything, though.
The screen is very light black nylon mesh, even lighter than the last screen tent that I owned. The center, top, and bottom have edging sewn onto them. The two outside wall ends are not edged. There are grommets spaced every 16" (my guestimate) in the top edging, and the kit comes with small screws to use as studs to hang the screen on through the grommet holes. The bottom of the screen has four pieces of 2' (my estimate) 1/2" metal tubing sewn in for weights to keep the screen hanging down. The un-edged sides have 4 velcro tabs each to hold them to the sides of the garage door opening. The magnetic catch in the center is the only disappointment. I was expecting a full length magnetic tape, but it is a simple refrigerator magnet sewn into a piece of nylon that only seals the opening at one point.
For the price, I think that it is worth giving it a shot to see how long it lasts, and of course to figure out how to make a better one if it does fail.....